查询词典 anti-desertification

The main points are: groundwater level has descended to an obvious extent; nature vegetation has been degenerated completely; groundwater salination degree has increased along the Tarim River and relevant regions; desertification has developed quickly, wind-sandy disaster has been seriously increasing.

因此从恢复生态学角度深入探讨受损生态系统，建立天然植被生态系统的脆弱性评价指标体系，提出受损生态系统人工恢复与重建措施对塔里木河流域生态治理具有重要的理论与实践意义。

Minqin Basin has been undergoing a rapid decline of underground water level and a quickening process of desertification, salinification and vegetation degeneration that have greatly affected human behavior in water use, especially in agricultural production and farmers' health.

该地区地下水位迅速下降，沙漠化、土壤盐渍化、植被衰退过程加快，这些生态环境变化对人类的生产、生活造成了重大而深刻的影响，并对人类身体健康造成了持久的危害。

Firstly, influenced by climate, topographical feature, soil and hydrological and geographical features, there was drought, flood, salinification, desertification and barren in Daxing, biological protection is necessary as a protective barrier to control sand from Yong Dinghe River bed Secondly, the windbreak system has features of urban forestry with aesthetic character and reasonable forest structure and arrangement.

首先，受气候、地貌、土壤和水文地质等多种因素制约，旱、涝、碱、沙、瘠等自然灾害普遍存在，防护林体系的生态环境保护作用应当得到充分体现，要成为首都&南大门&的生态屏障保护及永定河沙地的风沙源控制带。其次，要体现大城市城郊防护林体系的建设特点，布局合理，结构合理，具有一定的风景美学价值。

The change of landuse patterns in 1977-1998 shows indirectly the desertified land had been restored and is being restored. The relationship between landuse patterns and soil types was also analysed in this paper, from 1977 to 1998, the areas of rangeland and mobile sand dunes decreased in most soil types and the areas of woodland, shrubland and farmland increased, which means that the modification of landuse patterns due to limitation of soil types will be helpful to desertification control.

同时土地利用格局的时空变化与土壤类型间关系的分析表明，1977-1998的20余年间，在四种主要土壤类型上各种土地利用类型的变化具有一定的规律性，草牧场和流动沙地的面积基本上呈减小的趋势（分布在风沙土上的草牧场面积除外），而乔木林地，灌木林地和农地面积均为增加的趋势，这说明在土壤类型这一土地自然属性的严重制约下，人们被迫调整其土地利用格局，从而有效地遏制了荒漠化的发生和发展。

In order to study the variations of fertile island during the process of desertification, the authors investigated and analyzed the soil chemical characteristics beneath and around the tamarisk shrub, the tamarisk δ^13C in saline meadow, tamarisk shrubland and sandy desert landscape in northern Taklamakan Desert, northwestern China.

为探索荒漠化过程中肥岛效应的变化规律，选择盐化草甸、灌丛及沙漠3种景观类型，测定了柽柳灌丛下和灌丛间空地土壤有机碳、全氮、水分含量以及柽柳营养枝δ^13C等指标，并用土壤养分的富集系数来表征肥岛效应的强弱。

In the KARST area whererock desertification is very serious, how to actualize industr-ialisation, how to keepthe agriculture sustainable development in the process of citilization, how to protectthe limited cultivated land resource, how to ensure food basically self-support, andhow to ensure food security, have been the strategetic problems of sustainableeconomy and society development in this area.

在石漠化严重的喀斯特地区，如何在实现工业化、城镇化过程中保持农业可持续发展、保护有限的耕地资源、保证粮食基本自给、保障粮食安全是该地区经济和社会可持续发展的全局性战略问题。

The unsafely land right is the warm bed for land resources over exploration;forest and grassland right empty and imperfect have lead over uses of these resources and also restrict investment enthusiasm;investment main body fault location, unstable policies, restrict among departments, poor expiation mechanism and un-rational water resources management policy, these all have cause un-effect desertification control.

土地权属的不安全给人们随意开垦土地提供了负向激励；林权草权虚置和缺位，导致人们竞相利用，制约投资者积极性；投资主体错位，政策的不可持续性、部门间的相互制肘、补偿机制无力、水资源管理制度不合理等导致不能有效防治土地沙漠化。

Condensation water plays an important role in sustaining the vegetation and eco-environment in the desertification areas. The development of condensation water may be influenced by day and night trends of temperature and moisture in the vadose zone.

凝结水对维持荒漠地区的植被生态环境起到至关重要的作用，而凝结水的形成机制又反映在包气带地温与含水量的昼夜动态过程中。

But at the same time,itexisted in the fact that the water environment was amended,showingthat many lakes and ponds such as Hong Jiannuo Lake appearing andexpanding in the end of Qing dynasty.4.The vegetation in Mu Su Desert passed through several phases inhistorical times,the main phases are:the species composition ofvegetation community was gradually simplified;xeromorphous and sandyplant increased;the status of desert vegetation rose evidently.However,the change of vegetation zonation means that forest plainchanged into drought plain did not occur.5.The main modality of Mu Su Desert land degenerating has beendesertification,it had occurred before human activities intervenedintensively.Two-thirds of land has been desertification at variousdegrees.

但与此同时，也存在着局部的水环境改善，突出表现为红碱淖等湖沼在清末民初的出现和扩大。4、毛乌素沙地的植被在历史时期经历了群落种类组成渐趋简单、旱生沙生资源植物增加、荒漠植被地位明显上升等变化，但是并不存在由森林草原到干草原的地带性植被变化。5、沙漠化是毛乌素沙地土地退化的主要表现形式，在人类活动强烈干预以前就存在着，秦汉以来，有大约2／3的土地发生了程度不同的沙漠化。

These effects can reflect in the following several points: the desertification occurred in large scop...

这些影响在很大程度上限制了塔里木河下游经济的发展。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。